Problem with SMS messages

[Frank Lamoreaux]

Hello,
I am having a simple problem with SMS messages being sent to my Tmobile 
phones.  I did a manual telnet into my mail server that sends these 
messages and found that the ones that are coming from hobbit at xxx are 
failing.  But when I use my own From address Myemail at cmcflex.com the 
messages go through with no issues.  Any suggestions on approaches I can 
take to fixing this problem.  Or how could I change the from sender on 
the hobbit server?

Thank you for your time.

Frank